Acer AL922 User manual

1
AL 922 TFT LCD MONITOR
CONTENTS
1. INTRODUCTION ..........................................................................................................................................3
1.1 Scope.....................................................................................................................................................................3
1.2 Description............................................................................................................................................................3
2. ELECTRICAL REQUIREMENTS.................................................................................................................4
2.1 Standard Test Conditions......................................................................................................................................4
2.2 Lcd Monitor General Specification.......................................................................................................................4
2.3 Lcd Panel Specification ........................................................................................................................................5
2.4 Input Signals.......................................................................................................................................................11
2.5 Controls ..............................................................................................................................................................15
2.6 White Color Temperature ...................................................................................................................................17
2.7 Power Supply......................................................................................................................................................18
2.8 Plug & Play(Edid)...............................................................................................................................................18
2.9 Audio Technical Specification ............................................................................................................................19
3. VL-901 DISPLAY CONTROL BOARD.......................................................................................................20
3.1 Description..........................................................................................................................................................20
3.2 Features..............................................................................................................................................................20
3.3 Block Diagram....................................................................................................................................................21
3.4 Connector Locations...........................................................................................................................................22
3.5 Connector Type...................................................................................................................................................22
3.6 Connector Pin Assignment..................................................................................................................................22
4. VK901 Control Panel Board .....................................................................................................................25
4.1 Description..........................................................................................................................................................25
4.2 Connector and Switch Locations ........................................................................................................................25
4.3 Connector type....................................................................................................................................................25
4.4 Connector pin Assignment..................................................................................................................................25
4.5 Switch definition..................................................................................................................................................26
4.6 LED definition.....................................................................................................................................................26
5. INVERTER BOARD....................................................................................................................................27
5.1 Description..........................................................................................................................................................27
5.2 Electrical characteristics ....................................................................................................................................27
5.3 Connector locations............................................................................................................................................28
6. DC/DC POWER and Audio CKT VM-902 .................................................................................................29
6.1 Input:...................................................................................................................................................................29
6.2 Output:................................................................................................................................................................29
6.3 Efficiency. ...........................................................................................................................................................29
6.4 Connector Locations...........................................................................................................................................29
7. TROUBLESHOOTING ...............................................................................................................................31
7.1 Main Procedure..................................................................................................................................................31
8. MECHANICAL REQUIREMENTS..............................................................................................................36
8.1 Vibration and Shock............................................................................................................................................36
8.2 Package Drop Specification ...............................................................................................................................36
8.3 Dimension Size and Weight.................................................................................................................................37
8.4 Gap Spec.............................................................................................................................................................37
8.5 Tilt Base Rotation ...............................................................................................................................................39
8.6 Swivel Base Rotation...........................................................................................................................................39
8.7 Plastic Material ..................................................................................................................................................40
8.8 GAP Spec............................................................................................................................................................40
9. Power Line Transient Test (IEC 61000-4-4 Fast Transients/Burst)......................................................40
9.1 Peak Voltage.......................................................................................................................................................40
9.2 Polarity ..............................................................................................................................................................40
9.3 Repetition Frequency of the impulse...................................................................................................................40
9.4 Rise-Time ............................................................................................................................................................41
9.5 Impulse Duration ................................................................................................................................................41
9.6 Relation to Power Supply....................................................................................................................................41

2
9.7 Burst Duration....................................................................................................................................................41
9.8 Burst Period........................................................................................................................................................41
9.9 Climatic Conditions ............................................................................................................................................41
9.10 Test Procedure....................................................................................................................................................41
10.Power Line Surge Test (IEC 61000-4-5 Surge).......................................................................................43
10.1 Climatic Condition..............................................................................................................................................43
10.2 Test Conditions:..................................................................................................................................................43
11.ENVIROMENT REQUIREMENT ................................................................................................................44
11.1 Operating............................................................................................................................................................44
11.2 Storage or Shipment............................................................................................................................................44
12.REGULATION COMPLIANCE...................................................................................................................45
12.1 This product comply to the most current revisions of following regulations:.....................................................45
12.2 Electrostatics Discharge (ESD) ..........................................................................................................................46
13.QUALITY AND RELIABILITY ....................................................................................................................47
13.1 Quality Assurance...............................................................................................................................................47
13.2 Reliability............................................................................................................................................................47
Appendix A: Parts Lists ---------------------------------------------------------------------------------------- 48
Appendix B: Display Unit Assembly ------------------------------------------------------------------------- 53
Appendix C: P.C.B.A ASSEMBLY -------------------------------------------------------------------------- 61

3
1. INTRODUCTION
1.1 Scope
This specification defines the requirements for the 19” MICRO-PROCESSOR based Multi-
mode supported high resolution color LCD monitor, This monitor can be directly connected
to general 15 pin D-sub VGA connector and DVI-D digital connector, eliminates the
requirement of optional special display card. It also supports VESA DPMS power
management and plug & play function. There is a build-in stereo audio amplifier with
volume control to drive a pair of speakers.
1.2 Description
The LCD monitor is designed with the latest LCD technology to provide a performance
oriented product with no radiation. This will alleviate the growing health concerns. It is also
a space saving design, allowing more desktop space, and comparing to the traditional CRT
monitor, it consumes less power and gets less weight in addition MTBF target is 20k
hours or more.

4
2. ELECTRICAL REQUIREMENTS
2.1 Standard Test Conditions
All tests shall be performed under the following conditions, unless otherwise specified.
Ambient light: 225 lux
Viewing distance : 50 cm in front of LCD panel
Warrn up time
All specifications: 30 minutes
Fully functional: 5 seconds
Measuring Equipment: Chroma 2250 signal generator or equivalent, directly
Connected to the monitor under test.
Minolta CA100 photometer, or equivalent
Control settings
User brightness control: Maximum (unless otherwise specified )
User contrast control: Typical (unless otherwise specified )
User red/white balance,
Green/white balance and
Blue/white balance control: In the center (unless otherwise specified )
Power input : 110Vac or 230Vac
Ambient temperature : 20 ±5 ˚C ( 68 ±9 ˚F)
Analog input mode : 1280 x1024 /60 Hz
2.1.1 MEASUREMENT SYSTEMS
The units of measure stated in this document are listed below:
1 gamma = 1 nano tesla
1 tesla = 10,000 gauss
cm = in x 2.54
lb = kg x 2.2
degrees F = [°C x 1.8] + 32
degrees C = [°F - 32]/1.8
u' = 4x/(-2x + 12y + 3)
v' = 9y/(-2x + 12y + 3)
x = (27u'/4)/[(9u'/2) - 12v' + 9]
y = (3v')/[(9u'/2) - 12v' + 9]
nits = cd/(m2) = Ft-L x 3.426
lux = foot-candle x 10.76
2.2 LCD monitor General specification
Panel Type : 19 “ active matrix color TFT LCD
1). FUJITSU FLC48SXC8V
Display size : 376.32mm(H) x 301.056mm(V)
Display mode : VGA 720 X 400 (70 Hz)
VGA 640 X 480 (60/66/70/72/75 Hz)
SVGA 800 X 600 (60/70/72/75 Hz)

5
XGA 1024 X 768 (60/70/75 Hz)
SXGA 1280 X 1024 (60/70/75 Hz) standard resolution
Pixel pitch : 0.098x3mm(H) x 0.294mm(V)
Display Dot : 1280 x (RGB) x 1024
Pixel Clock : 25.2 – 135.0MHz
Contrast ratio: θ = 0˚500 : 1 (typical)
Brightness: 250 cd/m2 (typical)
Response time (Tr/Tf) : 15 /10 msec
Display color : 16777216 (8 bite color)
Viewing angle: L / R ≧85 / ≧85 ( ≧170 degrees horizontal typical)
U / D ≧85 / ≧85 ( ≧170 degrees vertical typical)
Luminance Uniformity : > 70 %
Pc interface: 1). Video : RGB analog 0.7V peak to peak
Sync : TTL positive or negative
2). Digital TMDS
Signal connector : 15 pin Mini D type, (standard VGA video)
DVI-D connector
Audio power : 1Wrms + 1Wrms ( 300Hz – 10kHz (S.P.L. – 10 dB))
Front control : power on/off with LED select (up, down) adjustment (+,-)
Interface frequency
Horizontal Frequency 24KHz --80KHz(analog), 31.5– 80KHz(digital)
Vertical Frequency 56Hz ----75Hz
Plug & play : Support VESA DDC2B functions
Power Input voltage : Single phase, 50/60HZ, 100VAC to 240VAC ±10%
Total output power : 60 Watt max.
2.3 LCD Panel Specification
2.3.1 LCD Panel Model (FUJITSU FLC48SXC8V)
•Display Type active matrix color TFT LCD
•Resolution 1280 x 1024 pixels
•Display Dot 1280 x (RGB) x 1024
•Display Area 376.32mm(H) x 301.056mm(V)
•Pixel Pitch 0.098x3mm(H) x 0.294mm(V)
•Display Color 16777216

6
•Lamp Voltage 700 Vrms typ.
•Lamp Current 7mA rms.( typ). 4 Lamp
•Weight 3200g .
•Optical Specifications
The following items are measured under stable conditions. The optical characteristics
should be measured in a dark room or equivalent state with the methods shown in
Note(4).
Measuring equipment : TOPCON BM-5A, BM-7, PHOTO RESEARCH PR650
(Inverter Freq. : 54kHz) *Ta =25 ±2°C, VDD=5V, fv=60 Hz, fDCLK=54 MHz, IL= 6.5mArms
Item Symbol Condition Min. Typ. Max. Unit Note
Contrast Ratio
(Center of screen) CR T.B.D 500 - (1)(2)(4)
BM-5A
Rising TR- 15 30
Response
Time Falling TF- 10 25
msec (1)(3)
BM-7
Luminance of White
(Center of screen) YL200 250 - cd/m2 (5)
BM-5A
Rx 0.648
Red Ry 0.346
Gx 0.292
Green Gy 0.602
Bx 0.150
Blue By 0.130
Wx 0.313
Color
Chromaticity
(CIE 1931)
White Wy
Normal
φ = 0˚
θ = 0˚
Viewing
Angle TYP.
-0.03
0.329
TYP.
+0.03
(1)(4)
PR650
θ L85 - -
Hor.
θ R85 - -
φ H85 - -
Viewing
Angle Ver.
φ L
CR≥10
85 - -
Degrees (1)(4)
BM-5A
Brightness Uniformity
(9 points) BUNI 70 - -
% (6)
BM-5A
Note 1) Definition of Viewing Angle: Viewing angle range (10≤CR)

7
Note 2) Definition of Contrast Ratio (CR): Ratio of gray max(Gmax),gray min(Gmin) at the
center point of panel.
Luminance with all pixels white (Gmax)
CR= 
Luminance with all pixels black (Gmin)
Note 3) Definition of Response time: Sum of TR , TF

8
Note 4) After stabilizing and leaving the panel alone at a given temperature for 30 min, the
measurement should be executed .Measurement should be executed n a stable,
windless ,and dark room.30 min after lighting the back-light. This should be
measured in the center of screen. Dual lamp current :13.0mA(6.5mA x2)(Refer to
the note(1) in the page 14 for more information ).
Environment condition :Ta=25±2°C
Optical characteristics measurement setup

9
Notes 5) Definition of Luminance of White : measure the luminance of white at center point.
Notes 6)Definition of 9 points brightness uniformity (Measuring points: Refer to the Note 5)
Bmin
BUNI=100∗
∗∗
∗














Bmax
Bmax: Maximum brightness
Bmin: Minimum brightness
Notes 7) Definition of Flicker level
Flicker Voltage pp
F = 

















x 100 %
LMD Voltage dc
♦
♦♦
♦One maximum value of three estimated values.
♦
♦♦
♦For this test ,an LMD(Light Measurement Device)is needed with adequate response time
to track any visible rate flicker component and with a voltage level output proportional
To luminance intensity.
♦
♦♦
♦Test Pattern: For dot inversion Driving(Gray levels of foreground dots on the test panel
Are G22,G32,and G45)
♦
♦♦
♦Test Point :Center point of the display area

10
Note 8) Definition of Crosstalk (Refer to the VESA STD)
The calculation for shadowing is made from the 2 luminance measurements Gbkg and Lsh,
as follows:
Lmax-Lmin
C
T = 











x100 %
Lmin
Where Lmax is the larger value of Gbkg or Lsh , and Lmin is the smaller of the two.
♦To determine background and foreground levels (colors),first set the background to any
gray scale or color level suitable for shadowing determination.(Note that it may take
several iterations of adjusting background level and box levels to determine the proper
value for the background .Next display the box levels to determine the proper value for the
background level. Look for shadowing in any direction from box E. Independently vary the
gray level (or color) of the background and box E until the worst case shadowing is
observed. This defines the background (Gbkg) and foreground (Gfg) levels to be
maintained for the remainder of the test.
♦One point only (the target) will be measured. To determine that point proceed as follows
Using the background and foreground gray levels of step1 (Gbkg and Gfg). Turn on each
box at a time. Look for the case with the worst shadowing. The box causing the worst case
is the shadowing source, or Bsrc. Use Bsrc and the box opposite from it that lies directly in
the shadow path. That is the target box, or Btgt. Note that box Eight be either Bsrc or Btgt,
depending on the shadowing conditions, but typically Bsrc and Btgt will be a pair of
opposite boxes, A&C or B&D. Btgt will only be displayed for aligning the LMD. It will be
turned off for the actual measurement.
♦
♦♦
♦The target box point (Btgt) will be measured with the source box (Bsrc) turned on then off.
(Btgt is for alignment purpose only) Display the background only at level Gbkg. Display
Btgt determined in step 2 above. Using the correct distance, angle, and measurement
aperture, align the LMD to the center of the Btgt. Turn off Btgt. With Gbkg set to its proper
level, measure the luminance (or color). Next,turn on the source box Bsrc. Again measure at
the center point of Btgt (without Btgt present.). In this case the LMD will be measuring the
shadowing level, Lsh.